Creating a new player_head datapack. When adding a new SkullOwner id/texture the game gives a fatel error and drops a player_head without the skullowner texture. If you keep the player_head in inventory and then exit Minecraft (Reloading, reloading Resource pack does not work). After reloading Minecraft the player_head get new textures and no fatel error. Everytime you kill said entity you get the correct player_head. the problem is that you actually have to kill the entity and get the head and reload Minecraft to get the correct player_head.

 

error message:

{Error executing task java.lang.IllegalStateException: Image is not allocated. at cpk.g(SourceFile:143) at cpk.a(SourceFile:325) at cpk.a(SourceFile:320) at cpk.a(SourceFile:316) at dpu.b(SourceFile:48) at dpu.a(SourceFile:56) at dpu$1.a(SourceFile:128) at dpu$1$$Lambda$2883/901009949.run(Unknown Source) at afs.p(SourceFile:66) at afs.bd(SourceFile:54) at cqx.d(SourceFile:911) at cqx.b(SourceFile:412) at net.minecraft.client.main.Main.main(SourceFile:154) }